E: If the FT847 is used together with
an external mast-mounted preamp, it is suggested to run two coax cables
from the mast to the shack. Not only that you save costs for a several
coax relays, but also you protect the preamp from any TX power.

The solution described here allows anytime to use the FT847 in the normal
way.

(you may klick on the pictures to get them in the full
scanned size)

FT847 RX signal flow before and after the modification:FT847 rear view after modification: